xdr_io.h

Go to the documentation of this file.

// The libMesh Finite Element Library.
// Copyright (C) 2002-2026 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 
 
#ifndef LIBMESH_XDR_IO_H
#define LIBMESH_XDR_IO_H
 
 
// Local includes
#include "libmesh/libmesh.h"
#include "libmesh/mesh_input.h"
#include "libmesh/mesh_output.h"
#include "libmesh/parallel_object.h"
 
// C++ includes
#include <string>
#include <vector>
 
namespace libMesh
{
 
// Forward declarations
class Xdr;
class Elem;
 
class XdrIO : public MeshInput<MeshBase>,
              public MeshOutput<MeshBase>,
              public ParallelObject
{
public:
  // The size used for encoding all id types in this file
  typedef largest_id_type xdr_id_type;
 
  // The size type used to read pre-1.3.0 header sizes (meta data information)
  typedef uint32_t old_header_id_type;
 
  // Likewise, but for 1.3.0 and newer header files
  typedef uint64_t new_header_id_type;
 
  explicit
  XdrIO (MeshBase &, const bool=false);
 
  explicit
  XdrIO (const MeshBase &, const bool=false);
 
  virtual ~XdrIO ();
 
  virtual void read (const std::string &) override;
 
  virtual void write (const std::string &) override;
 
  bool   binary() const { return _binary; }
  bool & binary()       { return _binary; }
 
  bool   legacy() const { return _legacy; }
  bool & legacy()       { return _legacy; }
 
  bool write_parallel() const;
 
  void set_write_parallel      (bool do_parallel = true);
 
  void set_auto_parallel ();
 
  const std::string & version () const { return _version; }
  std::string &       version ()       { return _version; }
 
  const std::string & boundary_condition_file_name() const { return _bc_file_name; }
  std::string &       boundary_condition_file_name()       { return _bc_file_name; }
 
  const std::string & partition_map_file_name() const { return _partition_map_file; }
  std::string &       partition_map_file_name()       { return _partition_map_file; }
 
  const std::string & subdomain_map_file_name() const { return _subdomain_map_file; }
  std::string &       subdomain_map_file_name()       { return _subdomain_map_file; }
 
  const std::string & polynomial_level_file_name() const { return _p_level_file; }
  std::string &       polynomial_level_file_name()       { return _p_level_file; }
 
  bool version_at_least_0_9_2() const;
 
  bool version_at_least_0_9_6() const;
 
  bool version_at_least_1_1_0() const;
 
  bool version_at_least_1_3_0() const;
 
  bool version_at_least_1_8_0() const;
 
private:
 
 
  //---------------------------------------------------------------------------
  // Write Implementation
  void write_serialized_subdomain_names(Xdr & io) const;
 
  void write_serialized_connectivity (Xdr & io, const dof_id_type n_elem,
                                      const new_header_id_type n_elem_integers) const;
 
  void write_serialized_nodes (Xdr & io, const dof_id_type n_nodes,
                               const new_header_id_type n_node_integers) const;
 
  void write_serialized_bcs_helper (Xdr & io, const new_header_id_type n_side_bcs, const std::string bc_type) const;
 
  void write_serialized_side_bcs (Xdr & io, const new_header_id_type n_side_bcs) const;
 
  void write_serialized_edge_bcs (Xdr & io, const new_header_id_type n_edge_bcs) const;
 
  void write_serialized_shellface_bcs (Xdr & io, const new_header_id_type n_shellface_bcs) const;
 
  void write_serialized_nodesets (Xdr & io, const new_header_id_type n_nodesets) const;
 
  void write_serialized_bc_names (Xdr & io, const BoundaryInfo & info, bool is_sideset) const;
 
 
  //---------------------------------------------------------------------------
  // Read Implementation
  //
  // In the function templates below, the "T type_size" argument is only
  // used for template argument deduction purposes. The value of this
  // parameter can be arbitrary because it will not be used within the
  // function.
 
  template <typename T>
  void read_header(Xdr & io, std::vector<T> & meta_data);
 
  void read_serialized_subdomain_names(Xdr & io);
 
  template <typename T>
  void read_serialized_connectivity (Xdr & io,
                                     const dof_id_type n_elem,
                                     const std::vector<new_header_id_type> & meta_data,
                                     T type_size);
 
  void read_serialized_nodes (Xdr & io, const dof_id_type n_nodes,
                              const std::vector<new_header_id_type> & meta_data);
 
  template <typename T>
  void read_serialized_bcs_helper (Xdr & io, T type_size, const std::string bc_type);
 
  template <typename T>
  void read_serialized_side_bcs (Xdr & io, T type_size);
 
  template <typename T>
  void read_serialized_edge_bcs (Xdr & io, T type_size);
 
  template <typename T>
  void read_serialized_shellface_bcs (Xdr & io, T type_size);
 
  template <typename T>
  void read_serialized_nodesets (Xdr & io, T type_size);
 
  void read_serialized_bc_names(Xdr & io, BoundaryInfo & info, bool is_sideset);
 
  //-------------------------------------------------------------------------
  void pack_element (std::vector<xdr_id_type> & conn,
                     const Elem * elem,
                     const dof_id_type parent_id,
                     const dof_id_type parent_pid,
                     const new_header_id_type n_elem_integers) const;
 
  bool _binary;
  bool _legacy;
  bool _write_serial;
  bool _write_parallel;
  bool _write_unique_id;
  unsigned int _field_width;
  std::string _version;
  std::string _bc_file_name;
  std::string _partition_map_file;
  std::string _subdomain_map_file;
  std::string _p_level_file;
 
  static const std::size_t io_blksize;
};
 
 
// ------------------------------------------------------------
// XdrIO inline members
 
inline
bool XdrIO::write_parallel() const
{
  // We can't insist on both serial and parallel
  libmesh_assert (!this->_write_serial || !this->_write_parallel);
 
  // If we insisted on serial, do that
  if (this->_write_serial)
    return false;
 
  // If we insisted on parallel, do that
  if (this->_write_parallel)
    return true;
 
  // If we're doing things automatically, check the mesh
  const MeshBase & mesh = MeshOutput<MeshBase>::mesh();
  return !mesh.is_serial();
}
 
 
 
inline
void XdrIO::set_write_parallel (bool do_parallel)
{
  this->_write_parallel = do_parallel;
 
  this->_write_serial = !do_parallel;
}
 
 
 
inline
void XdrIO::set_auto_parallel ()
{
  this->_write_serial   = false;
  this->_write_parallel = false;
}
 
 
} // namespace libMesh
 
 
 
#endif // LIBMESH_XDR_IO_H